local biz_name = "default_biz"

local function _default_biz()
    return coroutine.create(function ()
        local coroutine_yield = coroutine.yield
        local reply_ok = reply.status_type.ok
        local reply_setStatus = reply.setStatus
        local reply_appendContent = reply.appendContent
        while true do
            reply_appendContent("Unknown service")
            reply_setStatus(reply_ok)
            coroutine_yield()
        end
    end)
end

creators[biz_name] = function()
    f[biz_name] = _default_biz()
end
